tert-butyl (2S,4R)-2-ethynyl-4-hydroxypyrrolidine-1-carboxylate → (Z)-3-[(4-Acetyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-5-fluoro-4-[(2S,4R)-(4-hydroxy-pyrrolidin-2-yl)ethynyl]-2H-indol-2-one

HRID 366747Notes

Reaction equation

HRID 366747 reaction equation
C([N:8]1[C@H:12]([C:13]#[CH:14])[CH2:11][C@@H:10]([OH:15])[CH2:9]1)(OC(C)(C)C)=O.[C:16]([C:19]1[CH:20]=[C:21](/[CH:24]=[C:25]2\[C:26](=[O:36])[NH:27][C:28]3[C:33]\2=[C:32](I)[C:31]([F:35])=[CH:30][CH:29]=3)[NH:22][CH:23]=1)(=[O:18])[CH3:17]>CN(C=O)C.CCN(CC)CC.CCOC(C)=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:16]([C:19]1[CH:20]=[C:21](/[CH:24]=[C:25]2\[C:26](=[O:36])[NH:27][C:28]3[C:33]\2=[C:32]([C:14]#[C:13][C@@H:12]2[CH2:11][C@@H:10]([OH:15])[CH2:9][NH:8]2)[C:31]([F:35])=[CH:30][CH:29]=3)[NH:22][CH:23]=1)(=[O:18])[CH3:17]

Participants

7

Reactant 2

HCID 11816659tert-butyl (2S,4R)-2-ethynyl-4-hydroxypyrrolidine-1-carboxylateHCID 18366029(Z)-3-[(4-Acetyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-5-fluoro-4-iodo-2H-indol-2-one

Product 1

HCID 15907928(Z)-3-[(4-Acetyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-5-fluoro-4-[(2S,4R)-(4-hydroxy-pyrrolidin-2-yl)ethynyl]-2H-indol-2-one

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolventHCID 8857Ethyl AcetateSolvent

Procedure

Using Method C above, (3R,5S)-N-Boc-3-Hydroxy-5-ethynyl-pyrrolidine (240 mg, 1.13 mmol) (Example 99C above) was coupled with (Z)-3-[(4-acetyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-5-fluoro-4-iodo-2H-indol-2-one (150 mg, 0.38 mmol) (Example 90B) using (Ph3P)4Pd (43 mg, 0.04 mmol) and a catalytic amount of Cul in a mixture of DMF (5 mL) and Et3N (5 mL) as solvent at 80° C. for 5 hrs. Upon completion, the reaction mixture was diluted with EtOAc and extracted with H2O. The organic layer was dried over Na2SO4, concentrated and the residue was chromatographed on a silica gel column with a 0-100% EtOAc in hexanes gradient. The resulting intermediate was dissolved in 6 mL of a 50% trifluoroacetic acid in CH2Cl2 solution that contained 0.4 mL of H2O at 0° C. and stirred for 2 hrs. Upon completion, the solution was poured in ammonium hydroxide and extracted with a 5:1 (V/V) mixture of EtOAc and DMF. The organic layer was dried over Na2SO4 and concentrated. (Z)-3-[(4-Acetyl-1H-pyrrol-2-yl)methylene]-1,3-dihydro-5-fluoro-4-[(2S,4R)-(4-hydroxy-pyrrolidin-2-yl)ethynyl]-2H-indol-2-one was obtained after silica gel column chromatography with a 0-10% MeOH in CH2Cl2 gradient and trituration with CH2Cl2. (Yield 50 mg, 35%).

Workup

  1. extractionextracted with H2O
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated
  4. customthe residue was chromatographed on a silica gel column with a 0-100% EtOAc in hexanes gradient
  5. dissolutionThe resulting intermediate was dissolved in 6 mL of a 50% trifluoroacetic acid in CH2Cl2 solution that
  6. customat 0° C.
  7. additionUpon completion, the solution was poured in ammonium hydroxide
  8. extractionextracted with a 5:1 (V/V) mixture of EtOAc and DMF
  9. dry with materialThe organic layer was dried over Na2SO4
  10. concentrationconcentrated

Sources & evidence

ORD record
ord-aea68ab624a341d184e588a7b86fa417
Source dataset
uspto-grants-2000_10
Patent number
US06130239

Reaction notes

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